A.根据不同操作系统和版本的品牌手机，请根据实际情况操作。
B.针对绝大多数现行系统，已经实现免驱和系统直接打印。
C.无需安装手机驱动和手机APP，无需连接互联网。
D.网络打印机应与手机处于同一个局域网内方可进行打印。

a. According to different systems and versions of brand mobile phones , key and control way is different.
b. For the vast majority of systems, it can achieved direct printed without drive .No need Internet.
c. No need to install mobile phone drivers and mobile apps.
d. The network printer should be in the same local area network as the mobile phone .